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lmalafati_54233's avatar
lmalafati_54233
Icon for Nimbostratus rankNimbostratus
Feb 27, 2012

SNAT POOL and iRule

Hello,

 

 

I´m configuring a new VS from one customer that it works over udp. The service was working on Microsoft´s NLB.

 

 

When the new VS at BIG IP was configured the transaction doesn´t work, because the server response occurs in a new udp port. Bellow follow the application's workflow...

 

 

Workflow:

 

 

Client Request --> VS UDP 1998 (Auto Map) --> Pool Servers

 

 

So, to complete the request the server that received the request of the client needs to return to the client one response in other port, example udp port 1997. The problem It´s about how the VS is configured to use "auto map" the response from the server to client is based on BIG IP Interface.

 

 

Someone had already worked with this scenario? Is it possible write any iRule to try to solve this?

 

 

Thanks,

 

Leonardo

 

config
design

3 Replies

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  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Feb 29, 2012
    Hi Leonardo,

     

     

    Is it a static port that the server responds to the client on? If so, you should be able to use the listen command to set up a related connection:

     

     

    https://devcentral.f5.com/wiki/iRules.listen.ashx

     

     

    Aaron
  • lmalafati_54233's avatar
    lmalafati_54233
    Icon for Nimbostratus rankNimbostratus
    Mar 05, 2012
    Hi Aaron,

     

     

    Yes, that is correct. The server always responds to client on udp port 1997. I read the topic and I will try this iRule to try to solve my question.

     

     

    However the environment is working I will try to reproduce on my lab. I return to you with the response if had worked fine.

     

     

    Thanks,

     

    Leonardo

     

     

  • lmalafati_54233's avatar
    lmalafati_54233
    Icon for Nimbostratus rankNimbostratus
    Mar 05, 2012
    Hi Aaron,

     

     

    Yes, that is correct. The server always responds to client on udp port 1997. I read the topic and I will try this iRule to try to solve my question.

     

     

    However the environment is working I will try to reproduce on my lab. I return to you with the response if had worked fine.

     

     

    Thanks,

     

    Leonardo